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156Gd基态SU(3)→O(6)相变的一种微观理解

雷玉玺 张欢 石筑一 # 汪红 童红

雷玉玺, 张欢, 石筑一, #, 汪红, 童红. 156Gd基态SU(3)→O(6)相变的一种微观理解[J]. 原子核物理评论, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
引用本文: 雷玉玺, 张欢, 石筑一, #, 汪红, 童红. 156Gd基态SU(3)→O(6)相变的一种微观理解[J]. 原子核物理评论, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
LEI Yu-xi, ZHANG Huan, SHI Zhu-yi, #, WANG Hong, TONG Hong. Recognition of SU(3)→O(6) Quantum Phase Transition in Groundstates of 156Gd Nucleus within Microscopic Theory[J]. Nuclear Physics Review, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
Citation: LEI Yu-xi, ZHANG Huan, SHI Zhu-yi, #, WANG Hong, TONG Hong. Recognition of SU(3)→O(6) Quantum Phase Transition in Groundstates of 156Gd Nucleus within Microscopic Theory[J]. Nuclear Physics Review, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257

156Gd基态SU(3)→O(6)相变的一种微观理解

doi: 10.11804/NuclPhysRev.27.03.257

Recognition of SU(3)→O(6) Quantum Phase Transition in Groundstates of 156Gd Nucleus within Microscopic Theory

  • 摘要: γ射线能量自旋曲线指认156Gd核基态具有SU(3)和O(6)两种对称性。 基于微观sdIBM-max方案和单粒子能量实验值, 用两组核子之间的对作用、 四极对作用、 四极四极作用的等效强度参数, 都很好地再现了这两种能谱及其演化过程。 计算结果揭示出对基态相变的一种新理解: SU(3)的基准态是低激发低有序态, 而O(6)基准态则是高激发高有序的, 它们有临界区6+1—8+1态; 当核退耦到临界区时, 高有序基准态释放多余的有序结构能, 导致低有序基准态重组, 实现减速旋转驱动高有序核向着低有序核过渡的量子相变。最后用156Gd核的势能曲面作了直观说明。
    The γray energy over spin curves identifies that there are the SU(3) and O(6) symmetries in the groundstates of the 156Gd nucleus; by means of the microscopic sdIBMmax approach and signalparticle experimental energies the spectra of those two symmetries and their transient process are successfully reproduced through two parameters of nucleonnucleon effective interaction with pairing plus quadrupole pairing plus quadrupolequadrupole forces. The calculated results reveal a new way to recognize groundstates quantum phase transition, in which the basicstate of the SU(3) symmetry is a lowlying and lowordered state, while one of the O(6) are a highlying and highordered state, their critical region is between 6+1—8+1 states, the highordered basicstate releases spare orderedstructure energy, reducing rotationspeed, thus causing the restructure of lowordered basicstate and accomplishing the quantum phase transition from the highordered phase into the lowordered phase, the shape phase transition takes place along the yrast line of nucleus when it deexcited to the critical region. Because the structural phase transition takes place by noobvious charge of boson structure constants in the critical region it is a benignancy and calm transition with respect to its macroscopic behave. The potential energy surface of 156Gd nucleus has been illustrated to visualize.
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出版历程
  • 收稿日期:  1900-01-01
  • 修回日期:  1900-01-01
  • 刊出日期:  2010-09-20

156Gd基态SU(3)→O(6)相变的一种微观理解

doi: 10.11804/NuclPhysRev.27.03.257

摘要: γ射线能量自旋曲线指认156Gd核基态具有SU(3)和O(6)两种对称性。 基于微观sdIBM-max方案和单粒子能量实验值, 用两组核子之间的对作用、 四极对作用、 四极四极作用的等效强度参数, 都很好地再现了这两种能谱及其演化过程。 计算结果揭示出对基态相变的一种新理解: SU(3)的基准态是低激发低有序态, 而O(6)基准态则是高激发高有序的, 它们有临界区6+1—8+1态; 当核退耦到临界区时, 高有序基准态释放多余的有序结构能, 导致低有序基准态重组, 实现减速旋转驱动高有序核向着低有序核过渡的量子相变。最后用156Gd核的势能曲面作了直观说明。
The γray energy over spin curves identifies that there are the SU(3) and O(6) symmetries in the groundstates of the 156Gd nucleus; by means of the microscopic sdIBMmax approach and signalparticle experimental energies the spectra of those two symmetries and their transient process are successfully reproduced through two parameters of nucleonnucleon effective interaction with pairing plus quadrupole pairing plus quadrupolequadrupole forces. The calculated results reveal a new way to recognize groundstates quantum phase transition, in which the basicstate of the SU(3) symmetry is a lowlying and lowordered state, while one of the O(6) are a highlying and highordered state, their critical region is between 6+1—8+1 states, the highordered basicstate releases spare orderedstructure energy, reducing rotationspeed, thus causing the restructure of lowordered basicstate and accomplishing the quantum phase transition from the highordered phase into the lowordered phase, the shape phase transition takes place along the yrast line of nucleus when it deexcited to the critical region. Because the structural phase transition takes place by noobvious charge of boson structure constants in the critical region it is a benignancy and calm transition with respect to its macroscopic behave. The potential energy surface of 156Gd nucleus has been illustrated to visualize.

English Abstract

雷玉玺, 张欢, 石筑一, #, 汪红, 童红. 156Gd基态SU(3)→O(6)相变的一种微观理解[J]. 原子核物理评论, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
引用本文: 雷玉玺, 张欢, 石筑一, #, 汪红, 童红. 156Gd基态SU(3)→O(6)相变的一种微观理解[J]. 原子核物理评论, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
LEI Yu-xi, ZHANG Huan, SHI Zhu-yi, #, WANG Hong, TONG Hong. Recognition of SU(3)→O(6) Quantum Phase Transition in Groundstates of 156Gd Nucleus within Microscopic Theory[J]. Nuclear Physics Review, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257
Citation: LEI Yu-xi, ZHANG Huan, SHI Zhu-yi, #, WANG Hong, TONG Hong. Recognition of SU(3)→O(6) Quantum Phase Transition in Groundstates of 156Gd Nucleus within Microscopic Theory[J]. Nuclear Physics Review, 2010, 27(3): 257-262. doi: 10.11804/NuclPhysRev.27.03.257

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